18284028 has 24 divisors (see below), whose sum is σ = 48757632. Its totient is φ = 5223984.

The previous prime is 18284009. The next prime is 18284039. The reversal of 18284028 is 82048281.

It is a self number, because there is not a number n which added to its sum of digits gives 18284028.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108750 + ... + 108917.

It is an arithmetic number, because the mean of its divisors is an integer number (2031568).

Almost surely, 2^18284028 is an apocalyptic number.

It is an amenable number.

18284028 is an abundant number, since it is smaller than the sum of its proper divisors (30473604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18284028 is a wasteful number, since it uses less digits than its factorization.

18284028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217681 (or 217679 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 18284028 is about 4275.9826940716. The cubic root of 18284028 is about 263.4454037035.

The spelling of 18284028 in words is "eighteen million, two hundred eighty-four thousand, twenty-eight".